Diminish the undesirable spillover of sound into adjacent spaces with this Sonance medium round/square retrofit enclosure. The glass-reinforced polypropylene construction decreases the effect of wall cavity variations for the perfect audio experience. This Sonance medium round/ square retrofit enclosure reduces the transmission of sound from one room to the other by at least 20dB for a tranquil environment. Compatible with select 6.5" Sonance Visual Performance and Sonance MAG Series round speakers. Not compatible with Sonance VX Series speakersIncluding: VP60R, VP62R, VP64R, VP66R, VP68R, VP62R TL, VP62R SST/SUR TL, VP64R TL, and MAG6R models for a proper fit.Designed for biwired and single stereo speakersSonance provides different connection options.Decreases vibration between surfacesThis enclosure reduces sound spillover into adjacent spaces by 20dB.Two-packYou can use it with a pair of speakers.